PROSPERITY BANCSHARES INC — Director's Dealing 2011

Dec 8, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: PROSPERITY BANCSHARES INC (PRSP)
CIK: 0001068851
Period of Report: 2011-12-05

Reporting Person: MUELLER PERRY JR (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-12-05	Common Stock	S	25000	$40.06	Disposed	232518	Indirect

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	13766	Direct
Common Stock	61289	Indirect
Common Stock	3203	Indirect

Footnotes

F1: Includes 2,205 shares acquired through the Prosperity Bancshares, Inc. dividend reinvestment plan since the last filing by the reporting person.

F2: Includes 91 shares acquired through the Prosperity Bancshares, Inc. dividend reinvestment plan since the last filing by the reporting person.

F3: Includes 534 shares acquired through the Prosperity Bancshares, Inc. dividend reinvestment plan since the last filing by the reporting person.

F4: Includes 17 shares acquired through the Prosperity Bancshares, Inc. dividend reinvestment plan since the last filing by the reporting person.

F5: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $40.00 to $40.40 inclusive. The reporting person undertakes to provide Prosperity Bancshares, Inc., any security holder of Prosperity Bancshares, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each seperate price within the ranges set forth in this footnote.